Adolf kratjss



A. KRAUSS,

MECHANICAL INTEHRHPHR FOR ELECTRIC IGNITION SYSTEMS. APPUCAUON FILED FEB. 2a. was.

337, 56, Patented Apr. 20,1920.

8% ,ATTU Imp/5 paratively sharp ing the deflectable lever at two separated tli ate the ed UNITED sTA ns PATENT OFFICE.

ADOLF KBAUSS, 0F CANNSTATT, GERMANY, ASBIGNdB, BY MEBNE ASSIGNMENTS, T0

AMERICAN BOSCH MAGNETO CORPORATION, OF NEW YORK, N." Is, A

OF NEW YORK.

CORPORATION MECHANICAL INTERBUPTEB FOB ELECTRIC IGNITION SYSTEMS.

Specification of Letters Patent.

Patented Apr. 20, 1920.

Application med February 2B. 1918. Serial No. 219,735;

To all whom it may concern:

Be it known that I, AnoLr KnAUss :1 511bject of the German Emtperor, residing at and whose post-oflice ad ress is Gannstatt, Bryestrasse 8, Germany, have invented certain new and useful Improvements in Mechanical Interru ters for Electric Ignition S stems; and do hereby declare the tollowing to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which itappertains to make and use the same.

'1. he present invention relates to mechanical interrupters for electric ignition systems intended to be associated with internal combustion engines, and more particularly to a deflectable interrupter lever having a supporting structure comprising a spring attached to the lever and supported in such manner as to reduce the possibility of breakage and loosening.

As is well known to those skilled in the art, the leaf spring employed in a certain type of mechanical interrufpter for supportrom the bearing member, is liable to break rather easily; moreover, the means of fastening the spring to the bearing member is not free from ob- 'ections. In those cases in which the spring is fastened at a place intermediate its ends to the bearing member by means of a screw, the hole through which the screw passes is apt to weaken the spring precisel where it undergoes the most severe stress, t e edges of the bearing member limiting the movement of the spring on both sides of the place of its connection.

In accordance with the present invention, the foregoin objections are eliminated by supporting tie spring intermediate its ends places, to form a free sprin section there etween. In the specific embodiments hereinafter disclosed, the spring is clamped between the bearing member and a clamping member gripping the s ring between them at the twoseparated p aces which may be constituted by comedges or by opposed faces having comparative y extends areas. In this way, the part of the spring intermees or the extended areas is fre irom any su stantia-l bending stress so that the possibility of breaking 15 almost com pictely averted. If desired, the bearing member and the clamping member maybe fastened by a screw passing through the free spring section without weakenin the spring in a part subjected to materia bendmg stress.

n the drawings afiixed to this specification. and forming a part thereof, the interrupter elements are, as an exam is, carried by an interrupter disk intende to rotate with the armature of a magneto for periodic coiiperation with normally stationar cams. In these drawings, Figures 1, 3 an 5 are front views of three modifications within the invention; and Figs. 2, 4 and 6 are axial iews of portions thereof.

In Figs. 1 to 6, the. rotatable interrupter disk at carries, in a well known manner, the contact I) of the block a, and also has fastened to it in any suitable manner a bearin member a. The deflecta-ble lever f cartying at one end a block adapted to periodically engage the interrupter cams and at the other'end an interrupter contact coiiperative with the contact I), has aflixed near its ends the two ends of a supporting s ring or magazine of s rings of any suitable kind. That spring is c amped intermediate of its ends between the bearing member e and a clamping member h, which gri the "sprin at two places z and k separated from each other to form a free sprin section therebetween substantially free rom any material bending stress.

In the modification of Figs. 1 and 2, the bearing member-,0 has two separated upstanding portions whereas the clamping member h is in the form of an eccentric, conical or other suitable form of pin arranged,- when positioned, to rip the spring 9 between it and said upstan ing portions at the points i and k. y

'In the modification of Figs. 3 and 4, the upstanding portion of the bearin member has a continuous surface, whereas t e clamping member h is partly cut away to form two sharp edges adapted, when positioned, to grip the spring 9 between it and the bearing member at the two separated places i and k.

In the-embodiment of Figs. 5 and 6 the clampin member It has two flat sur aces of exten ed area separated from each other, and adapted toclamp the s' ring 9 between them and the bearing mom or e, the intermediate part of the clam ing member being so shaped as to leave a ree spring section therebotween, as shown. The screw 1 fastens the bearing'and clamping member together, and passes through t e free section of 'the spring.

As a result of the fact that the spring g is gripped between the bearing and clampin members at two as arated places to form a ree spring section t erebetween, all practical danger of breakage or loosemn of the spring is averted. Furthermore the ending efi'orts exerted on the spring are almost perfectly balanced.

Having thus described my invention, what I claim is: l

1. In a mechanical interrupter for electric i nition systems, an interrupter lever, a deectable interrupter lever cooperative therewith, a s ring havin its ends fastened to the deflectab le lever, an clamping means gripping the spring intermediate its ends at two separated places to form a free spring section therebetween.

2. In a mechanical interrupter for electric i nition systems, an interrupter lever, a deectable interru t-er lever cooperative therewith, a spring aving its ends fastened to the deflectable lever, a bearing member, and a clamping member, the two members gripping the spring intermediate its ends at two separated places to form a free spring section therebetween.

3. In a mechanical interrupter for electric i nition systems, an interrupter lever, a deectable interrupter lever cooperative therewith, a spring, the deflectable lever, and bearing and clamping members gripping the slprmg intermediate its ends at two separate places to form a free spring section therebetween, one of aving its ends fastened to said members having a cut-away portion intermediate its gri ping places.

4. In a mechanloa interrupter for electric i nition systems, an interrupter lever, a def ectable interru ter lever coil erative therewith, a spring aving its an s fastened to the deflectable lever, and bearing and clamping members gripping the s ring intermediate its ends at two separate places to form a free spring section therebetween, the clamping member having a cut-away portion intermediate its gripping places.

5. In a mechanical interrupter for electric ignition systems, an interrupter lever, a defiectable interrupter lever cooperative therewith, a spring havin its ends fastened to the deflectable lever, an bearing and clamping members gripping thes ring intermediate its ends at two separate places to form a free spring section therebetween, the clamping member having two gripping surfaces of extended area with a cut away portion therebetween.

(i. In a mechanical interrupter for electric i nition systems, an interrupter lever, a de ectable interrupter lever 006 erative therewith, a. sprin having its ends astened to the deflectable Iever, bearing and clamping members gripping the spring intermediate its ends at two separated places to form a free spring section ,therebetween, and a fastening device passing through the free section of the spring to secure the members together with thesprin therebetween.

In testimony whereof ailix my signature in presence of two witnesses.

ADOLF KRAUSS i \Vitnesses:

Aoonr Lneunns, PAUL Woman. 

